package com.example.androidhuachipa;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URLEncoder;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;

public class RestClient {
		private ArrayList<NameValuePair> params;
		private ArrayList<NameValuePair> headers;

		private String url;

		private int responseCode;
		private String message;

		private String response;

		public String getResponse() {
			return response;
		}

		public String getErrorMessage() {
			return message;
		}

		public int getResponseCode() {
			return responseCode;
		}

		public RestClient(String url) {
			this.url = url;
			params = new ArrayList<NameValuePair>();
			headers = new ArrayList<NameValuePair>();
		}

		public void AddParam(String name, String value) {
			params.add(new BasicNameValuePair(name, value));
		}

		public void AddHeader(String name, String value) {
			headers.add(new BasicNameValuePair(name, value));
		}

		public void Execute(RequestMethod method) throws Exception {
			switch (method) {
			case GET: {
				// add parameters
				String combinedParams = "";
				if (!params.isEmpty()) {
					combinedParams += "?";
					for (NameValuePair p : params) {
						String paramString = p.getName() + "="
								+ URLEncoder.encode(p.getValue(), "UTF-8");
						if (combinedParams.length() > 1) {
							combinedParams += "&" + paramString;
						} else {
							combinedParams += paramString;
						}
					}
				}

				HttpGet request = new HttpGet(url + combinedParams);

				// add headers
				for (NameValuePair h : headers) {
					request.addHeader(h.getName(), h.getValue());
				}

				executeRequest(request, url);
				break;
			}
			case POST: {
				HttpPost request = new HttpPost(url);

				// add headers
				for (NameValuePair h : headers) {
					request.addHeader(h.getName(), h.getValue());
				}

				if (!params.isEmpty()) {
					request.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
				}

				executeRequest(request, url);
				break;
			}
			}
		}

		private void executeRequest(HttpUriRequest request, String url) {
			HttpClient client = new DefaultHttpClient();

			HttpResponse httpResponse;

			try {
				httpResponse = client.execute(request);
				responseCode = httpResponse.getStatusLine().getStatusCode();
				message = httpResponse.getStatusLine().getReasonPhrase();

				HttpEntity entity = httpResponse.getEntity();

				if (entity != null) {

					InputStream instream = entity.getContent();
					response = convertStreamToString(instream);

					// Closing the input stream will trigger connection release
					instream.close();
				}

			} catch (ClientProtocolException e) {
				client.getConnectionManager().shutdown();
				e.printStackTrace();
			} catch (IOException e) {
				client.getConnectionManager().shutdown();
				e.printStackTrace();
			}
		}

		private static String convertStreamToString(InputStream is) {

			BufferedReader reader = new BufferedReader(new InputStreamReader(is));
			StringBuilder sb = new StringBuilder();

			String line = null;
			try {
				while ((line = reader.readLine()) != null) {
					sb.append(line + "\n");
				}
			} catch (IOException e) {
				e.printStackTrace();
			} finally {
				try {
					is.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return sb.toString();
		}
	}